local wezterm = require 'wezterm';
local keys = require 'keys';

-- Position the first window at top‑right quarter of the screen
wezterm.on('gui-startup', function()
    local screens = wezterm.gui.screens()
    local scr = screens.main or screens.active
    if not scr then 
        -- If screens can't be fetched yet, fall back to spawning normally
        wezterm.mux.spawn_window({})
        return 
    end

    -- Safely calculate a sizing multiplier if the screen has scaled High-DPI
    -- Laptops usually report a DPI of 144, 192, etc., whereas base is 96.
    local scale = 1.0
    if scr.dpi and scr.dpi > 96 then
        scale = scr.dpi / 96
    end

    -- Standard target dimensions (half width, half height)
    local quarter_width = math.floor(scr.width / 2)
    local quarter_height = math.floor(scr.height / 2)

    -- Adjust target location to keep window from hanging off scaled laptop margins
    local x = scr.x + (scr.width - (quarter_width / scale))
    local y = scr.y

    -- Inject position parameters straight into the initial spawn call (prevents crashing and jumping)
    local tab, pane, window = wezterm.mux.spawn_window({
        position = {
            x = math.floor(x),
            y = math.floor(y),
        }
    })

    if window then
        local gui_window = window:gui_window()
        if gui_window then
            gui_window:set_inner_size(quarter_width, quarter_height)
        end
    end
end)

return {
    font = wezterm.font_with_fallback({
        {family="JetBrains Mono", weight = "Regular"},
        "DejaVu Sans",
        "Hack",
        "Noto Sans Bamum",
        "Noto Sans Ol Chiki",
    }),
    font_size = 11,
    disable_default_key_bindings = true,
    hide_tab_bar_if_only_one_tab = true,
    enable_tab_bar = true,
    
    -- SCROLL BAR CONFIGURATION
    enable_scroll_bar = true,
    
    -- MOUSE BINDINGS (DEFINED HERE, NOT IN keys.lua)
    mouse_bindings = {
        -- Double-click: Select word under cursor
        {
            event = { Down = { streak = 2, button = "Left" } },
            action = wezterm.action.SelectTextAtMouseCursor("Word"),
        },
        -- Triple-click: Select line under cursor
        {
            event = { Down = { streak = 3, button = "Left" } },
            action = wezterm.action.SelectTextAtMouseCursor("Line"),
        },
        -- Middle click: Paste from clipboard
        {
            event = { Down = { streak = 1, button = "Middle" } },
            action = wezterm.action.PasteFrom("Clipboard"),
        },
        -- RIGHT CLICK: PASTE FROM CLIPBOARD (FIXED)
        {
            event = { Down = { streak = 1, button = "Right" } },
            action = wezterm.action.PasteFrom("Clipboard"),
        },
    },
    
    keys = keys,
    adjust_window_size_when_changing_font_size = false,
    color_scheme = 'Modus-Vivendi',
}

--[[
Action                 Result

Drag to select              Automatically copies to clipboard
Double-click                Selects and copies the word under cursor
Triple-click                Selects and copies the entire line
Middle click                Pastes from clipboard
RIGHT CLICK                 PASTES FROM CLIPBOARD (FIXED)
Scroll bar                  Visible on the right side
Shift + PageUp/PageDown     Scroll by page
Ctrl + Shift + Up/Down      Scroll by line
]]